Genotype-dependent variation in the transpiration efficiency of plants and photosynthetic activity of flag leaves in spring barley under varied nutrition

• Authors: A. Krzeminska , A.G. Gorny
• Languages of publication: EN

Abstracts

EN

In the study, spring barley genotypes of various origin and breeding history were found to show a broad genetic variation in the vegetative and generative measures of the whole-plant transpiration efficiency (TE), photosynthesis (A) and transpiration (E) rates of flag leaves, leaf efficiency of gas exchange (A/E) and stress tolerance (T) when grown till maturity in soil-pots under high and reduced NPK supplies. Broad-sense heritabilities for the characteristics ranged from 0.61 to 0.87. Significant genotype-nutrition interactions were noticed, constituting 19-23 % of the total variance in TE measures. The results suggest that at least some ?exotic? accessions from Ethiopia, Syria, Morocco and/or Tibet may serve as attractive genetic sources of novel variations in TE, T and A for the breeding of barleys of improved adaptation to less favourable fertilisation.

Keywords

EN

BARLEY; FLAG LEAF; GAS EXCHANGE; GENETIC VARIATION; PHOTOSYNTHESIS; TRANSPIRATION

Discipline

• GENETICS: GENETICS

• Publisher: Institute of Plant Genetics, Polish Academy of Sciences
• Journal: Journal of Applied Genetics
• Year: 2003
• Volume: 44
• Issue: 4
• Pages: 481-489

Contributors

author

A. Krzeminska

author

A.G. Gorny

• Document Type: ARTICLE
• Publication order reference: A.G. Gorny, Institute of Plant Genetics, Polish Academy of Sciences, ul. Strzeszynska 34, 60-479 Poznan, Poland